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Toner composition for magnetic ink character recognition

A technology of toner and composition, applied in the direction of developer, instrument, optics, etc.

Active Publication Date: 2022-07-01
XEROX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] MICR toners can be more challenging to develop in some development subsystems

Method used

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  • Toner composition for magnetic ink character recognition
  • Toner composition for magnetic ink character recognition
  • Toner composition for magnetic ink character recognition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0067] Preparation of MICR Toner Particles According to Examples herein

example 1

[0068] Example 1A - Preparation of Precursor Particles

[0069] About 57% cross-linked polyester resin (propoxylated bisphenol A fumarate resin, Resapol from Reichold), about 20% magnetite such as B353 Magnox, about 5.2% polyethylene wax such as PW2000, About 4.7% polypropylene wax such as Viscol 660P, about 4.7% compatibilizer such as Lotader AX-8840 and about 2.8% colorant (eg R330 carbon black) are melt mixed and extruded in a ZSK-25 extruder. The cross-linked resin was prepared according to the method outlined in US Patent No. 6,359,105.

[0070] The resulting extrudates of linear and cross-linked resin were pulverized in a 200AFG fluid bed jet mill. During the pulverization process, about 0.3% of TS530 silica was added as a glidant. The parent particles had a median particle size of about 9 microns, an average size of about 9.5 μm after removal of excess fines content, ie, had a fines percentage of less than 5 μm or no greater than 15% by number as measured by Multisi...

example 1

[0072] Example 1B - Blending of Surface Additives with Parent Particles

[0073] The precursor particles obtained above were mixed in a 75L Henschel vertical mixer at a specific power level of about 228 W / lb and provided a total specific energy of 15.2 Wh / lb. Power and energy levels are set with impeller speed and blending time. The additive formulations selected based on the additive levels are as follows:

[0074] additive additive% NA50HS(Silica) 3.99％ SMT5103 (Titanium Dioxide) 0.87％ ZnSt-L 0.50％

[0075] This formulation resulted in a total surface area coverage of the particles from the surface additive of about 175%, and a surface area coverage of about 10.2 for NA50HS silica to SMT5103 titania. 0.5% zinc stearate was also added as a lubricant.

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Abstract

The present invention provides MICR toner compositions for use in offset offset printing (or offset printing). This MICR toner composition exhibits desirable magnetic properties.

Description

Background technique [0001] The embodiments herein relate to toner compositions for use in Magnetic Ink Character Recognition ("MICR"), and suitable for use in xerographic systems with lithographic offset printing qualities. [0002] In an xerographic process, an image is generated after a series of steps including charging the photoreceptor surface, converting computer data or raw images into an optical or projected image, exposing the photoreceptor surface to the projected image, by toning The toner particles apply an electric field to develop the toner particles on the photoreceptor, transfer the toner particles from the photoreceptor to the media, and heat the toner particles so that they fuse together and permanently adhere to the media. [0003] Magnetic toners for printing may contain, for example, magnetic particles such as magnetite in a fluid medium, and a magnetic coating of iron oxide, chromium dioxide or similar materials dispersed in a carrier including binders a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G9/083G03G9/087
CPCG03G9/0833G03G9/0834G03G9/08755G03G9/0835G03G9/08793G03G9/09725G03G9/0831G03G9/0839G03G9/083G03G9/097G03G9/0836G03G9/09708
Inventor J·A·莫拉莱斯-提拉杜
Owner XEROX CORP